Due to the covid infection in both Spain & Uk, I need to check my account on line to ensure my funds have sufficient balance to pay my outgoing local bills. I have held a debit card account with Sabadell for the last five years, and for some reason have trouble bringing my account up on my mobile.
In order to solve any problem with your mobile application, you must contact your bank. From what you mentioned in your question, it is Banco Sabadell..
Here you will find all the contact details of Banco Sabadell.
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